Light from the sun allows a solar cell to move electrons from the positive to the negative terminal, doing 2.4×10−19 j of work per electron. what is the emf of this solar cell?

The emf of the cell will be 1.5 volt  

Explanation:

We have given work done

Charge on electron that is q ,  

Energy of electron is given by , here e is charge on electron and V is emf

V = 1.5 Volt , that is emf of the cell

So the emf of the cell will be 1.5 volt

explanation:

an enlarged virtual image is the answer

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000